I know it's too late now, but to the op.
(And useful info for others)
I think I read your airfare is booked with Delta.
They have a risk-free cancelation policy which allows cancelation within the first 24 hrs after booking.
Although you booked non-refundable , from what I understand ,if you're outside of that 1 day period,you may cancel and get an e-credit.
The credit can be used on a future booking for airfare.